Tripping mechanism



June 16, 1942. G. J. GRIZEY 2,286,484

TRIPPING MECHANISM Filed Aug. 9, 1940 GEORGE J GPJZEY Chic amp Patented June 16, 1942 TRIPPING MECHANISM George J. Grizey, Canton, Conn, assignor to Veeder-Root Incorporated, Hartford, Conn., a corporation of Connecticut Application August 9, 1940, Serial No. 351,925

5 Claims.

shown in United States Letters Patent to Harvey N. Bliss, No. 2,159,314, dated May 23, 1939. The predetermining counter shown in the aforementioned patent is adapted, after a predetermined yardage has been woven on the loom, to automatically operate a plunger to cause movement A of the Bowden control wire and thus operate the automatic stop mechanism of the loom.

One purpose of the present invention is to provide a device which, when associated with a control wire, will assure positive releasing of the drop wire Whenever the control wire is moved.

Another purpose is a tripping device which is rugged in construction, utilizes a minimum number of parts, and which may be readily and economically manufactured.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements,

and arrangement of parts which will be exemplified in the construction hereafter set forth and the scope of the application of which will be indicated in the appended claims.

In the accompanying drawing:

Figure 1 is a front elevation of the tripping mechanism partly in section to show the interior construction thereof and with the tripping means in closed position;

Fig. 2 is a side elevation of Fig. 1 and also partly in section to show the interior construction;

Fig. 3 is a view similar to Fig. 1 with the tripping mechanism in open position; and

Fig. 4 is a bottom View of Fig. 1.

Referring to the drawing, the tripping mechi anism, generally designated as A, includes a cylindrical casing it having a centrally arranged bore l2 threaded at its upper end for securing the casing onto a collar l4 depending from a cap or {I head It. Mounted within the bore l2 of the casing I0 is a hollow piston is which is normally urged to uppermost or set position by a spring 29 positioned between a flange 22 on the upper end of the piston and an upwardly facing shoulder 24 in the wall of the bore E2. The upper end of the piston H3 is closed by a cap 54 provided with a central opening 56 in which there is secured one end of a control wire 58. The control wire 53-1eads through an opening 6% in the cap it and then to the cutmeter or predetermining counter. Thus when the control wire is actuated, the piston it will be driven downwardly against the tension of the spring 29, which spring normally tends to hold the piston in its uppermost or set position.

The piston it carries at its lower end a drop wire carrier 23. As indicated, the carrier 28 comprisesv two symmetrical members 3%! each having a depending finger 32 and a pivot arm 34 extending at an angle of about forty-five degrees to the depending fingers. The members 39 are arranged in opposed relationship within the diametrically opposite vertical slots 26 in the bottom of the piston, and, when so arranged, the pivot arms 3% cross one another and are pivotally mounted on a pin 35 mounted in the piston at right angles to the slots 26.

The outer ends of the pivot arms 3d are formed to provide a lower stop 38 parallel to the outer edges of the finger 32 and adapted to engage against the wall of the bore H of the piston when the mechanism is in set position. Above the stop 38 pivot arms are cut inwardly to provide an upwardly facing stop shoulder 20 and a top outwardly facing stop shoulder $2 for holding the carrying members in open position when the device is tripped, as is hereinafter apparent.

In order to carry the drop wire, the inner edges of the finger 32 of the carrying members 33 each have an inwardly extending tab M adapted to lie adjacent one another to form a supporting bridge. With this construction, when the tripping mechanism is in set or loaded position, as indicated in Fig. 1, the drop wire 45 is supported by the tabs 44 which extend through the slot 48 provided in the drop wire. As best seen in Fig. 2, the drop wire is of usual construction including an opening 5! spaced from the slot 48 and through which a thread (not shown) leading to the loom may pass.

To release the drop wire when the piston IB is forced downwardly, there is mounted within the hollow bore thereof a plunger 58 which is normally spring pressed to its lowermost position in contact with the upper edges of the pivot arms by a spring 52 located between the upper end of the plunger and the bottom of the closure cap 54. With the plunger 5% so arranged, upon piston I8 being forced downwardly by the control wire 58, the drop wire carrying member will be simultaneously lowered therewith until the stops 40 of the pivot arms 34 clear the end of the casing It]. When this occurs, the plunger 56 will cause the casing members 35! to pivot about the pin 36 until the outwardly facing shoulders 42 abut the inner bore of the casing ID, in which position the fingers 36 have been opened sufficiently (as indicated in Fig. 3) to separate the tabs 44 and thus release the drop Wire 46. As soon as the downward force exerted by the control wire on the piston is released, the spring 26 will then tend to raise the piston to its set position, but when this occurs the upward- 1y facing shoulders 40 of the pivot arms will .engage beneath the end of the casing and secure the mechanism in its tripped position until the device has been manually reset. I

For convenience in resetting the tripping mechanism, the piston l8 may also be provided with diametrically opposite vertical slots '62 arranged at right angles to the slots 36, whereby the drop wire may be readily inserted and aligned with the carrier tabs for securing same.

From the foregoing it will be seen that the carrier 26 comprises cooperating pivotal members 30 movable from a closed position, where they carry the drop wire 46, to an open position to release the drop wire 46. When in closed position, the carrier members 3!] lie within the periphery of the piston [8. Thus when the spring '20 automatically urges the piston upwardly, the carrier will be carried upwardly and into the casing and held in closed position inasmuch as the pivot pin 36 is so positioned relative to the end of the casing l that it will be raised into the casing when the piston is normally urged to its uppermost position. Upon the operation .of the tripping mechanism, the piston 18 will be urged downwardly until the pivot pin 36 of the carrier and the upwardly facing shoulders of the pivot arms clear the end of the casing, whereupon the plunger 50 will pivot the carrier to open position and bring the outwardly facing stops 42 into abutment against the bore of the casing Hi. When so positioned, the carrier will be automatically locked in open position against the tendency of the spring 26 to again raise the piston 18 into the casing.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

I claim as my invention:

1. In a loom controlling structure, a drop wire carrier comprising a pair of members pivoted relative to each other and movable from a closed to an open position, means for normally maintaining said carrier members in a closed position wherein the members support a drop wire, means for opening said carrier members to release the drop wire carried thereby, and means automatically operable upon the opening of the carrier members for retaining same open.

2. In a device of the character described for controlling a loom, a casing, a piston slidably mounted in the casing, spring means normally urging the piston inwardly of the casing, a drop wire carrier comprising cooperating members carried by said piston, a pin upon which said carrier members are mounted, said pin being so located relative to the end of the piston that it will be positioned in the casing when the piston is norm-ally urged into the casing whereby said carriers are held in closed position so as to support a loom controlling drop wire, means carried by the piston normally tending to pivot said carrier members about the pivot pin to open position so as to release the drop wire, and stop means carried by the upper end of said carrier members and engageable with the end of the casing for holding said carrier members in open position when the piston is moved outwardly of the casing.

3. In a loom controlling structure, a casing, a piston slidably mounted in the casing, a drop wire carrier pivotally mounted .on the piston, spring means normally maintaining the piston in position whereby the drop wire carrier will be held in closed position, and means carried by the piston for pivoting the drop wire carrier to open position when the piston is moved to tripped position.

4. In a loom controlling structure, a casing, a piston slidably mounted in the casing, spring means normally maintaining said piston inwardly of the casing, a pair of carrier members pivotally mounted on the piston and lying wholly within the periphery thereof in a closed position for supporting a drop wire when the piston is located inwardly in the casing and means carried by the piston for automatically pivoting said members apart to thereby release a drop wire when the piston is urged outwardly of the casing.

'5. In a loom controlling structure, said structure comprising a casing, a piston slidably mounted in the casing, a pair of cooperating members pivotally mounted on the piston for movement between open and closed position, said members lying in a closed position within the periphery of the piston and cooperating to support a drop wire when the piston is located within the casing, spring means normally urging said piston into said casing and said members to closed position, and means carried by the piston for automatically pivoting said carrier members to open position so as to release a drop wire when the piston is urged outwardly of the casing.

GEORGE J. GRIZEY. 

